Specifications

Integrating Voice Mail with Cisco Unified SRST
How to Integrate Voice Mail with Cisco Unified SRST
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Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide
Configuring Message Waiting Indication
The MWI relay mechanism is initiated after someone leaves a voice-mail message on the remote
voice-mail message system. MWI relay is required when one Cisco Unity Voice Mail system is shared
by multiple Cisco Unified SRST routers. SRST routers use the SIP Subscribe and Notify methods for
MWI. See the Configuring Cisco IOS SIP Configuration Guide for more information on SIP MWI and
the Subscribe and Notify methods. The SRST router that is the SIP MWI relay server acts as the SIP
notifier. The other remote routers act as the SIP subscribers.
SUMMARY STEPS
1. call-manager-fallback
2. mwi relay
3. mwi reg-e164
4. exit
5. sip-ua
6. mwi-server {ipv4:destination-address | dns:host-name} [expires seconds] [port port]
[transport {tcp | udp}] [unsolicited]
7. exit
DETAILED STEPS
Command Purpose
Step 1
call-manager-fallback
Example:
Router(config)# call-manager-fallback
Enters call-manager-fallback configuration mode.
Step 2
mwi relay
Example:
Router(config-cm-fallback)# mwi relay
Enables the SRST router to relay MWI information to
remote Cisco IP phones.
Step 3
mwi reg-e164
Example:
Router(config-cm-fallback)# mwi reg-e164
Registers E.164 numbers rather than extension
numbers with a SIP proxy or registrar.
Step 4
exit
Example:
Router(config-cm-fallback)# exit
Exits call-manager-fallback configuration mode.
Step 5
sip-ua
Example:
Router(config)# sip-ua
Enters SIP user-agent configuration mode.